Vat for wet treating of lengths of fabric



June 13, 1933. H. LEPPIN (AT FOR WET TREATING OF LENGTHS 0F FABRIC Filed Feb. .26. 1931 Patented June 13, 1933 HANS LEPPIN', OF KBEFELD, GERMANY I VAT FOB WET TREATING OF LENGTHS F FABRIC 'hpplication filed February 26, 1931, Serial No. 518,444, and in/Germany October 8, 1930.

This invention relates to a vat for treating lengths of fabric of an kind in spread state. he invention has or its object especiall to conduct dry or wet fabrics free from olds and free of tension underneath the liquid level in the vat.

A spread out length of fabric has hitherto been generall held at the entrance end of the vat by a p aiter. It is evident that at the plaiting, air is enclosed between the several layers of fabric, whereby floating of the fabric on the surface of the liquid and consequent- 1 an irregular action of the latter is caused.

ccording to the invention a chute is arranged at the entrance end of the vat inclined towards the vat, and over which the length of fabric is conducted by means of a thinlayer of flowing water, the end of the chute being bent downward to under the level of the water in the vat, so that the fabric length strikes perpendicularly upon the water level in the vat, the drawing along of air being effectively prevented. A fabric length introduced into the vat in this manner sinks instantaneously and is then conducted along the bottom of the vat.

According to the invention the fabric length is maintained spread out also exclusively with the aid of theli uid and at the 0 entrance end of the vat pre erably thereby that the liquid flow, carrying along the fabric length, spreads out from the middle towards both sides, and at'the outlet end of the vat thereby that the liquid is sucked off towards both sides transversely to the direction in which the fabric length moves. This effect can further be improved by jets of liquid squirted from the middle in out- 40 ward direction upon the fabric length. At

the delivery end of the vat a spreading device may further be arranged consisting of a chute and of a flow of liquid on thischute spreading from the middle to both sides. This flow 2f liquid may be directed in counter current to the fabric, in order to increase the spreading effect.

Two embodiments of the invention are illustrated by way of example in the accompanying drawing in which Fig. 1 shows a vat according to the invention in longitudinal section.

Fig. 2 is a top plan view of Fig. 1.

Fig. 3 shows in longitudinal section a vat of modified form of construction.

The vat a may be of any desired shape. At the entrance end of the vat a chute b of sheet metal, wood or other suitable material inclined towards the vat is arranged and bordered atthe sides by side walls 0. The chute b is downwardly bent at the lower end, so that it dips vertically into the liquid to below the liquid level in the vat. The chute 6 extends from a liquid reservoir (1, the front wall 6 of which is open at the middle, diverging deflecting plates 9 extending from the edges of the aperture. The fabric length i is conducted over a guide roll h.

A flow of liquid flows continually from the reservoir d in a thin layer upon the chute and spreads on the chute to two sides. This liquid flow carries the length of fabric and pushes the same vertically into the liquid in the vat a, as shown in Fig. 1. The liquid flowing on the chute 6 serves for two purposes, firstl to carry along the fabric length and second y to spread the same.

At the discharge end of vat a a chamber is is arranged, from which the liquid is sucked off towards both sides by pipes m which farther down unite to a common pipe n from which the liquid is returned into the reservoir d by means of a pump 0. Owing to the fact that the liquid flows off transversely to the fabric length at the discharge end of the vat, the spreading of this fabric length is ensured. This effect would further be increased by liquid jets thrown from pipes p onto the fabric length, these liquid jets being directed outwardly from the middle. The pipes 29 may be arranged above or below the liquid level.

As shown in Fig. 3 a second chute r is arranged at the discharge end of the vat, over which liquid flows from a reservoir 8 in a 95 direction opposite the direction of movement of the length of fabric which is conducted over thissecond chute r. The pump sucks off again at k and supplies the liquid uniformly to the two reservoirs d and s. The

spreading effect exerted upon the length of fabrlc is considerably mcreased by thls flow of liquid flowing in a direction opposite to the direction in which the fabric moves, the liquid spreading from the centre towards both sides.

I claim 1. A vat for the wet treatment of fabrics, comprising in combination a chute downwardly inclined towards the vat and downwardly bent at its lower end so that it terminates directly below the surface of the liquid in the vat perpendicularly thereto, means for supplying liquid in a thin layer to the upper end of said chute to convey the fabric along said chute, and deflecting plates at the upper end of said chute adapted to guide the liquid from the middle towards the sides of said chute to spread the fabric in passing over said chute.

2. A vat for wet treatment of fabric lengths as specified in claim 1, comprising a chamber at the discharge end, and means for sucking off the liquid from said chamber from both sides of the same transversel to the direction in which the fabric lengt moves.

3. A vat for wet treatment of fabric lengths as specified in claim 1, comprising a chamber at the discharge end, means for sucking ofl the liquid from said chamber from both sides of the same transversely to the direction in which the fabric length moves, and spray pipes near the discharge end in said vat for spraying liquid jets inclined from the middle towards both sides upon said fabric length to spread the same.

4. A vat as specified in claim 1, comprising a second inclined chute at the discharge end K of said vat, and means for making a thin layer of water spreading out from the middle towards both sides flow over said chute in a direction opposite to the direction of movement of the fabric length. y

In testimony whereof I afiix my signature.

HANS LEPPIN. 

